package 团体程序设计天梯赛练习集;

import java.util.Scanner;

public class 计算摄氏温度 {
	public static void main(String[] args) {
		Scanner scanner=new Scanner(System.in);
		int F=scanner.nextInt();
		int C=5*(F-32)/9;
		System.out.println("Celsius = "+C);
	}

}
